Regenerative furnace



REGENERATIVE FURNACE l. N m u E@ ma@ @MW m mi@ @d i j?. M 4 W i im m 1 mi m .P/ v

Oct. 7, 1924- l,5l,588 A. N. Dil-:HL ET AL REGJSNERATIVE FURNACE Filed 'May 1s 1922 4 sheets-sheen 2 Oct. 7, 1924. 1,510,588

" A A. N, DIYEHL ET Al.

REGENERA'TIVE FuRNAcE Filed May la, 1922 4 sheets-sheer 5 ...p0 l, Y 20 K/ I n any .y f n .1)

Oct. 7, 1924.' 1,510,588

A. N. DIEHL ET AL REGENERATIVE FURNACE Filed May 18,'1922` 4 sheets-sheet 4 l Patented @et 7, 1924.

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Amaosn N. Dram. AND salutari e. WoaToIN, or DUQUESNE, PENNSYLVANIA.

BEGENERATIVE FURNncE.

Application led May 18.y 1922. Serial'No. 581,859.

To atl whom it may concern;

Be it known that we, AMBRosE N. DmHL and SAMUEL lGr. WoR'roN, citizens of the United States, and residents of-Duquesne, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Regenerative Furnaces, of which the following is a specification.

This invention relates to regenerative furnaces and while not limited thereto relates more particularly to regenerative open hearth furnaces, and has for one of its ob*- jects theprovision of a novel port construction for furnaces of this type that will eliminate the double' roof heretofore used i over the ports.

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Another object of the invention is to provide a port construction in which it is not necessary to provide artificial cooling means for the top wall or roof over the gas port.

A further object of the invention is to provide a port construction which will cause .a greater surface contact of the incoming air and gas, thus providing for rapid and complete combustion.

A stilll further object of the invention is to provide a furnace having the novel design, construction and combination of vparts hereinafter described and illustrated in the Aaccolnpanylng drawings 1n which:

Figure 1 is a sectional elevation of an open hearth furnace having our invention embodied therein.

Figure 2 is a` sectional plan on the line II-II of Figure 1.

Fi e 3 is a cross sectional elevation the line III-III of Figure 1.

Figure 4 is a sectional elevation line IV-IV of Figure 2..

The invention is shown embodied in an on the Aopen hearth furnace of standard design havin a hearth 2 and arched roof 3.

he furnace is provided with a central gas or fuel port 4, and two independent air ports 5 and 6 at each of the opposite ends of the furnace hearth. The ports are arranged in the same manner and'have the same construction at each endof the-hearth, so it is to be understood that the description of one will apply to both ends.

`The gas or fuel port 4 is supplied with gas by an uptake flue 7 extending upwardly from a slag pocket 8, which is connected with theusual regenerative chamber (not shown) adapted to. preheat the gas in the usual manner. Itwill be understood, however, that gas or -other fuel such as liquid or suspended solid`fuel may be supplied to the port 4 direct, without preheating, and

for this purpose a burner 9 is providedin the back wall of the chamber 4.

The air ports 5 and 6 receive their supply l of air through upwardly extending flues 10 and 11, respectively, leading from a suitable slag pocket 12 which is connected with the usual regenerative chamber (not shown) adapted to preheat the 'air in the usual manner.

The gas or fuel port 4 is provided with a bottom wall 14 inclined downwardly toward the hearth 2, side walls 15 and 16 and an inclined arched top wall or roof 17.

The top wall 17 of the port 4 has its forward end built into the arched roof 3 of the furnace and has `the greater portion of its length extending rearwardly beyond the roof 3 and exposed to the atmosphere so as to provide for natural cooling thereof. By providing a construction in which the top wall of the fuel' port 4 is exposed to the atmosphere for cooling, the artificial cooling of this wall is dispensed with.

The air ports 5 and 6 are bounded by side walls of the fuel port and the side walls of the furnace and have inclined bottom walls 19 and inclined topvwalls 20. The'bottom walls 19 of the ports 5 and 6 have their forward or hearth edges terminatingon the same plane as the forward or hearth edge of the bottom wall 14 of the fuel port 4. The air ports 5 and 6 are of greater height than the fuel port 4 and, therefore, the top i vwalls 20 are on ha plane-considerably above such lflow of an' will intersect the-flow of y fuel from 'the fuel port 4. The novel roof desi of the [ports 5 and 6 also co-operates with the baes. in causing the air to How from the ports 5 and 6 across the pathl of flow of Vfuel from' the port 4.

Thel ports 5 and 6 being of a greater constructed as set forth above, a more direct passage for the air is provided7 the friction loss in the entering air is reduced, and

a. greater surface contact of the air and gas is obtained, whereby accelerated and more complete combustion is obtained.

lt will be understood that while we have shown our invention applied to open hearth regenerative furnaces it is not limited thereto and may be applied to any furnace of the regenerative type.

We claim v1. A regenerative furnace having a fuel port and two independent air ports at each end thereof, one of said independent air ports being on each side of each of said fuel ports, said air ports having the forward or hearth-edges of their bottom walls on the same plane as the forward or hearth edges of the bottom walls of said gas ports, said air ports extending upwardly to a point materially above said gas ports at their inner ends, and means for directing the air from said air ports inwardly across the fuel stream from said fuel ports.

2. A regenerative' furnace having a hearth, a gas port and two independent air ports at `each end of the hearth, one of said independent air ports being on each side of each of said gas ports, said air and said gas ports all havingr their bottom walls inclined toward the hearth and having their forward or hearth edges terminating on the same plane, said air por-ts being of a greater height than said gas ports, and means for directing the air froml .said air ports inwardly on an angle across the fuel stream from said gas ports.

3. A regenerative furnace having a hearth, a gas port and two; independent air ports at each end of the hearth, one of said independent air ports being on each side of each of said gas ports, said gasgports having arched top walls open for a part of their length to the atmosphere and having their forward ends built into the furnace roof,

said air ports having arched top walls, the

estense walls of said air ports adapted to co-operate" with the arched top walls of said 'ports to di! rect the air from said ports inwardly across the fuel stream from said gas ports.

L A regenerative furnace having a hearth, a gas portand two independent air ports at each end of said hearth, said gas port having an arched top' wall exposed for a part of its length to the atmosphere and having its forward end built into the furnace roof, one of said independent air ports being on each side of each of said gas ports,

lsaid air ports having the forward or hearth edges of their bottom walls on the same plane with the Aforward or hearth edges of the bottom walls of said gas ports and said air ports extending upwardly to a point materially above said gas ports at their inner ends, said air ports being 'provided with arched top walls,.the `forward ends of which extend into the furnace a greater distance at the outside edge than on the inside edge, and baffles built into the outside walls of said air ports adapted to co-oper-ate with the arched top walls of said ports lto direct the air from said air ports inwardly on an angle across the. fuel stream from said gas ports. x

5. ln a regenerative furnace having a hearth, a fuel port and two independent air ports at each end of said hearth, one of said independent air ports being at each side of each of said fuel ports, said fuel ports being provided with arched top vwalls open for a part of their length to the atmosphere and having their forward ends built into the furnace roof, said air ports being of greater height than said fuel ports, and said fuel and said air ports all having their bottom walls inclined toward the hearth and having their forward, or inner edges terminating on the same plane.

In testimony whereof we have hereunto set our hands. I

AMBRUSE N. DIEHL. SAMUEL G. VVORTON. 

